Indicator



v June 16, 1936. l R. RECHNIZER Y 2,044,100

' INDICATOR Filed` Aug. 26, 1933 lNvENToR 500004' EC/VA//ZE/ BY? ,wwf

4 ATTORNEY Patented June 16, 1936 l 2,044,100

UNITED STATES PATENT OFFICE INDICATOR Rudolf Reclmitzer, Berlin, Germany, assignor to Telefunken Gesellschaft fr Drahtlose Telegraphie m. b. H., Berlin, Germany, a corporation of Germany Application August 26, 19303, Serial No. 686,865 In Germany September 6, 1932 2 Claims. (Cl. Z50-20) This invention relates to a new and improved former 8. A glow-lamp 9 is united with the scale or dial for radio-receiver sets. secondary terminals of the transformer. The Scale arrangements are known in the art arrangement is soy tuned that the lamp 9 will which comprise station names and in which the ash up or light only when the signal picked up point of setting or adjustment is made visible by the receiver is so strong that it will serve to by the aid of a line of light or the like. The operate the loudspeaker strongly enough. disadvantage of such arrangements consists in What I claim is: that when making the set it is hard to tell bel. Station indicating means for a radio reforehand what stations will be prnperly ree,- ceiving set, comprising a transparent screen con- 10 ceved at the place where the set is set up and taining a plurality of station names, a member 10 used. As a result, diiiiculties often arise in that arranged in back of said transparent screen, said a station clearly received at the receiving place member having an opening therein slightly is not included on the dial, or else a station for larger than the space occupied by any one 0f which the receiving conditions are notoriously said station names, means associated with the l5 poor', S included in the list Of Stations. Another tuning dial of said radio receiving set for mov- 15 fact is that such dial arrangements may not be ing said member so that the opening therein used Simultaneously fOI TeCeiVei' apparatus 0f may be caused to register with any one of said dierent power or performance for the reason station names, a source of iight mounted at the that, for instance, for low power receivers the rear ef Seid member for illuminating a Station l0 list 0f Stations Will be tOOl long, While that 0f name on said transparent screen through the 20 larger power receivers should comprise a greater Opening in Said member, and means for enernumber of stations. gizing said source of light from the output cir- TheSe diieulties are Obviated ih the present cuit of the power stage of the radio receiving set invention by PTOVidiIig WaYS and means S0 that during intervals when the received signal exonly such stations will be made visible as proneeds a, certain Critical value. 25 Vide energies at the pOint 0f I'eCeptiOh ade- 2. Means for indicating the position of the quately large for operating the loudspeaker. All tuning Ymeans of a radio receiver, comprising the aPDIOVed f01m 0f the ihVehtiOIl iS illustrated ih combination of a stationary transparent screen the accompanying drawing in Which Fg- 1 iS a having a plurality of station names marked Plan VieW Of the dial arrangement and Fig. 2 iS a thereon, upper and lower pulleys, a control knob 30 Circuit diagiam ShOWihg hOW the glOW lamp connected to one of said pulleys, a belt passing Which COOpeIateS With the dial arrangement iS over said pulleys, a member secured to said belt actuated. at the re-ar of said screen and having an open- Fig. 1 ShOWS arl arrangement Of this kihd- A ing therein longer and Wider than the space transparent Screen l bearing the Station names, occupied by one of said station names, a source is arranged in fro-nt of a slotte-d member 2. In 0f light mounted e1; the rear of said member and back 0f the Slotted member a gaSeOliS COildllC- arranged to illuminate a single station name on tion tube or glow-lamp 9 is mounted. By aCtU.- said screen through the opening in said member, ation of the master tuning knob or dial 5 of the and means for energizing said Source 0f light i0 tuning means, the slotted member 2 is shifted from the power tube 0f the radio receiver when 40 with the setting of the tuning dial by means of the received signal energy exeeeds a, predeterthe pulleys 4 and the cord drives 3. The output mined velue, circuit of the power tube 6 (Fig. 2) contains the RUDOLF RECHNITZER, loudspeaker connection means 1 and the trans- 

